Soil fertility management liminmg

Alexander W. Fagyan Department of Soil science SOIL FERTILITY MANAGEMENT

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Soil Fertility vs. Soil Productivity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Soil Sampling Procedure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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b. Nutrient deficiency symptom ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],Symptoms appearing first on older leaves Lack of 1. Leaves at first green, then often reddish P 2. Tip Chlorosis, leaves turn yellow-brown from tip inwards, older leaves brown, plant light green N 3. Marginal necrosis: leaves with brown margin, hang down limply K 4. Large chlorotic spots in beets, cabbage, legumes: leaves yellow between veins; finally brown In potatoes: leaf center spotted yellow-brown, margin remains green for long time Mg 5. Small necrotic spots: in beets and cabbage; respectively yellow and yellow-brown spots entire leaf Mn

Symptoms appearing first on younger leaves Lack of 1. yellow-green leaves with light yellow veins S 2. Yellow leaves green veins Fe ,[object Object],[object Object],[object Object],[object Object],[object Object],Mn Mn 4. Clamped heart in cabbage: deformed leaf and warped young leaves in young plants spoon shaped leaves Mo 5. White-leaf in legumes Cu

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Why acid soils should be limed? ,[object Object],[object Object],[object Object],[object Object]

Benefits derived from liming the soil ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Crop pH requirement Crop pH requirement Crop pH requirement Abaca 6-0-7.0 Coffee 4.5-7.0 Peanut 6.0-6.5 Amaplaya 6.0-6.7 Corn 5.3-7.3 Potato 4.8-6.5 Bean (baguio, lima, string 5.5-6.5 Ginger 6.0-6.8 Sweet Pepper 5.8-7.0 Cabbage 6.0-6.5 Lettuce 5.5-7.0 Sweet potato 5.0-7.0 Carrot 6.0-6.8 Pea (Garden pea, cow pea 6.0-7.5 5.5-7.0 Squash 5.5-7.0 Cauliflower 5.5-6.6 Okra 6.0-6.5 Tomato 5.5-6.5 Celery 6.0-7.0 Onion 5.8-6.5 Tobacco 5.5-6.5

[object Object],2008 (cabbage) 2009 (celery) Initial Final Initial Final Solid 1.25 1.03 1.09 1.11 Liquid 1.24 1.00 1.06 1.09 Control 1.31 1.01 1.22 1.27 Just before planting 1.24 1.01 1.06 1.06 One week before planting 1.25 1.00 1.04 1.09 Two weeks before planting 1.27 1.01 1.08 1.10 Three weeks before planting 1.17 1.02 1.06 1.06 Foure weeks before planting 1.20 1.04 1.06 1.08

[object Object],2009 2006 2008 Initial Final Solid 1.09 1.09 1.49 1.51 Liquid 1.07 1.02 1.49 1.50 Control 1.19 1.04 1.91 1.94 Just before planting 1.12 1.01 1.24 1.26 One week before planting 1.05 1.01 1.28 1.31 Two weeks before planting 1.03 1.01 1.48 1.58 Three weeks before planting 1.04 1.02 1.64 1.68 Four weeks before planting 1.05 0.99 1.35 1.38

[object Object],[object Object],Ton/hectare Irisan lime (Ca(OH)2) Mean/66 plants No lime 6.89 5.92 5.77 11.84 3.89 17.76 5.44

[object Object],Liming Material Neutralizing Power CaCO 3 – Calcite 100 Ca(OH) 2 – Hydrated lime 134 CaO – Burnt lime, quick lime 178 MgCO 3 .CaCO 3 – Dolomite 109 MgO 250 MgCO 3 119 Mg(OH) 2 172 Other sources: oyster shells, wood ash

[object Object],Place found Initial pH Lime requirement t/ha Ca(OH) 2 Poblacion 4.4 5.92 Guioeng 4.3 8.88 Lo-o 4.1 11.84 Nan-agto 4.6 5.92 Nabalicong 5.6 Bayoyo 4.2 8.88 Sinipsip 4.4 8.88 Bangao 4.8 8.88 Akiki 4.2 11.84

[object Object],Final pH 2006 2008 (Quino and Fagyan) 2009(Compala) initial Final Solid 5.1 5.4 5.5 5.6 Liquid 5.2 5.3 5.5 5.7 No lime 4.6 4.5 4.7 5.3 Just before planting 4.7 5.2 5.4 5.8 One week before planting 4.9 5.4 5.6 5.8 Two weeks 5.3 5.7 5.9 5.6 Three weeks 5.6 5.7 5.5 5.6 Four weeks before planting 5.8 5.8 5.7 5.7 INITIAL 4.6 5.7

Frequency of application ,[object Object],[object Object],[object Object],[object Object]

Soil fertility management liminmg

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